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Roy Glauber

1925–2018 · quantum optics, laser physics
American theoretical physicist, considered the founder of quantum optics. He developed the theory of higher-order optical coherence, introduced the concept of coherent states (Glauber states), and explained photon statistics in laser radiation. Winner of the Nobel Prize in 2005.

Biography

Born in New York. He received his PhD from Harvard. At age 18, he participated in the Manhattan Project. He worked at the Institute for Advanced Study, Caltech, and Harvard University. The Nobel Prize was awarded for his contribution to the quantum theory of optical coherence.

Key discoveries

💡 As a student, he was recruited for the Manhattan Project, where at age 18 he calculated nuclear reaction cross sections for the atomic bomb.
"He described light as not merely a wave or a particle, but something more subtle that is only beginning to be understood with the help of quantum theory."
Concepts
quantum informationquantum measurementquantum optics
Laws
Hong–Ou–Mandel effect
Scientists
Charles TownesAlain AspectDavid DeutschShuji NakamuraJohn Stewart BellAlbert A. MichelsonSerge HarocheDavid Bohm

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Atomic Lock: How to Catch Light in a Solar Storm
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Optics2026-01-042 minarXiv:2601.01667express
Light from Within: How to See 12 Centimeters Deep into the Body
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Optics2026-01-101 minarXiv:2601.06448express
Peering into Tight Spots: A Fiber Thinner Than a Hair
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Optics2026-01-101 minarXiv:2601.06614express
A Whole Object in a Single Flash
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Optics2026-01-172 minarXiv:2601.11870express
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A Camera That Sees the Unseen
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Optics2026-01-182 minarXiv:2601.12561express
A Laser the Size of an Organelle
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Color Under the Microscope Becomes a Depth Map
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Hologram Prints in Seconds
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Optics2026-01-231 minarXiv:2601.16904express
Microscope Sees Cells Like an Artist
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Optics2026-01-252 minarXiv:2601.17694express
Light That Corrects Itself
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Optics2026-01-251 minarXiv:2601.17816express
Printing with Light: a Million Voxels per Second
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Optics2026-01-251 minarXiv:2601.18031express
Seeing Heat: How a Camera Captures Invisible Light
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Optics2026-01-301 minarXiv:2602.00363express
Glowing Heart Cells
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Instrumentation2026-02-031 minarXiv:2602.03752express
Invisible Lenses Made of Grass
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Optics2026-02-041 minarXiv:2602.04618express
Counting Blood Cells Without Lenses
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Optics2026-02-061 minarXiv:2602.06316express
Laser Draws Tiny Channels for Water
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Optics2026-02-062 minarXiv:2602.07222express
Light Trapped in Glass: Miniature Beam Transformers
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Optics2026-02-081 minarXiv:2602.07792express
Glowing Stripes in a Crystal: How to See the Heart of a Photonic Chip
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Medical Physics2026-02-092 minarXiv:2602.08836express
Light That Checks Your Eyes
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Optics2026-02-101 minarXiv:2602.09732express
How to Make Tissues Transparent for Microscopy
A thick slice of tissue under a microscope looks like fogged glass: light scatters and details are lost. Usually, to see cells, you stain them or cut them into very thin slices. But there's a simpler way — make the slice itself transparent, as if you've wiped the glass clean.
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Optics2026-02-141 minarXiv:2602.13714express
Light Solves Problems with Greater Precision
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Optics2026-02-161 minarXiv:2602.14762express
Light Pierces Milk: Lensless Microscope Sees Through Murky Media
Light in murky water behaves like a person in thick fog: every step is a collision, and the picture blurs. That's why a regular microscope can't see through skin or milk. Engineers found a workaround — look in the infrared range, where light collides less with particles.
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Optics2026-02-211 minarXiv:2602.18704express
Droplets of Light Catch Molecules
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Optics2026-02-211 minarXiv:2602.18778express
Tiny Optical Chip Sorts Images Without Training
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Optics2026-02-281 minarXiv:2603.00572express
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Optics2026-03-021 minarXiv:2603.01386express
One Pulse Instead of a Thousand
A laser hits the sample, and molecules inside start to vibrate. This vibration heats the material by tiny fractions of a degree. Previously, such heating was considered a nuisance, but now it's used to read chemical composition, like guessing who's coming down the hallway by the sound of footsteps.
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Optics2026-03-021 minarXiv:2603.01862express
A Chip Instead of a Lab: Checking Epilepsy Medication at the Bedside
When treating epilepsy, doctors adjust the drug dose almost blindly. Too little, and seizures continue; too much, and side effects appear. Usually, a patient's blood is sent to a lab, and the result comes back a day or two later. Now, the same test can be done on a tiny silicon chip. The sensor works like a highly sensitive nose.
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Optics2026-03-021 minarXiv:2603.02446express
Seeing the Invisible: A Clear View of Transparent Cells
A glass marble in a glass of water is nearly invisible, but if you look through it at a checkered tablecloth, the lines behind it appear distorted. Transparent cells behave the same way: light passes through them but is slightly slowed and changes direction.
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Optics2026-03-042 minarXiv:2603.03812express
Live Cells at Video Speed
A fat droplet inside a living cell is like a bobber in rough water. It doesn't move in a straight line but in jerks, sometimes pausing, sometimes speeding up. Previously, such movements could only be seen in a single plane, like watching the bobber from above without knowing its depth.
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Optics2026-03-061 minarXiv:2603.05785express
A Microscope That Sees Deep Inside Tumors
Light we can't see but feel as heat turns out to be the key to cellular life. A new type of microscope uses waves 2000–2500 nanometers long, three times longer than red light, and such waves barely scatter in tissue. Thanks to this, the device peers into a tumor spheroid like a flashlight through frosted glass, illuminating individual molecules.
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Robert HookeSerge HarocheRoy Glauberoptical microscopyspectroscopyNMR spectroscopyinterferometerSpectral Analysis
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Quantum Physics2026-03-152 minarXiv:2603.14201express
The Light That Gives Away Symmetry
In a dark room, an atom and light are locked together in a mirrored box. The box is so small that the atom cannot simply release light: they constantly exchange energy, like two dancers who never let go of each other's hands.
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